CN219244303U

CN219244303U - Hearth temperature detection device for steel rolling heating furnace

Info

Publication number: CN219244303U
Application number: CN202320232290.7U
Authority: CN
Inventors: 余进伟; 赵德涛; 刘长江
Original assignee: Baowu Group Echeng Iron and Steel Co Ltd
Current assignee: Baowu Group Echeng Iron and Steel Co Ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-06-23
Anticipated expiration: 2033-02-16

Abstract

The utility model discloses a hearth temperature detection device for a steel rolling heating furnace, which comprises a hearth wall, wherein a wall hole is formed in the hearth wall, a base is arranged on the hearth wall, a middle hole corresponding to the wall hole is formed in the base, and a heat preservation cylinder is arranged on the base; the heat preservation cylinder is provided with an end cover, the end cover is provided with a temperature measuring resistance rod which is in sliding connection with the end cover, the temperature measuring resistance rod extends into the hearth wall through the end cover and is used for detecting the temperature in the hearth wall, the end cover is provided with a locking mechanism, and the locking mechanism is used for locking and fixing the relative position of the temperature measuring resistance rod and the end cover; the utility model has the advantages of simple structure, convenient installation, fixed temperature measuring resistance rod, no displacement and fixed temperature measuring point; keeping the ambient temperature at room temperature, and compensating normal operation of the lead; the maintenance and the replacement are convenient and safe; the temperature measurement is accurate, the furnace is not stopped, and the steel rolling quality is not affected; the holes are completely sealed, so that the gas leakage is less, and the safety effect is greatly improved.

Description

Hearth temperature detection device for steel rolling heating furnace

Technical Field

The utility model relates to the technical field of detection of hearth temperature of heating furnaces, in particular to a hearth temperature detection device for a steel rolling heating furnace.

Background

The heating furnace heats the billet to a uniform temperature (austenite structure) suitable for rolling by burning coal gas, and then sends the billet reaching a proper temperature condition out of the heating furnace to enter a subsequent rolling mill for rolling into steel meeting the condition.

The accuracy of the temperature of the hearth of the heating furnace has important significance for heating the billet, and the heating furnace is controlled in three sections along the length direction: namely a preheating section, a heating section and a soaking section. The temperature of the preheating section is generally controlled to be about 950 ℃, the temperature of the heating section is generally controlled to be about 1100 ℃, the temperature of the soaking section is generally controlled to be about 1150 ℃, if the temperature is too high, the surface of a steel billet is melted, and if the temperature is too low, the grain structure in the steel billet cannot be fully austenitized, and cracks can appear in the steel billet during rolling, so that the quality problem of the steel is caused.

The current temperature measuring device adopts a direct-inserted S-shaped thermocouple, a temperature measuring rod of the thermocouple passes through a temperature measuring hole on the wall of the heating furnace to directly contact flame with positive pressure and high temperature combustion, and fireproof cotton is plugged on the periphery of the temperature measuring hole. After a period of use, the thermocouple can not be stable due to vibration caused by movement of a billet in the heating furnace, and after a long time, flame is blown out due to positive pressure blowing of a fireproof cotton quilt hearth, so that the ambient temperature rises to hundreds of degrees, and a compensating wire of the thermocouple can only work normally in an environment of 100 ℃, so that temperature measurement is inaccurate, inconvenience is brought to real-time monitoring of production, and production progress is influenced. Because the thermocouple is directly inserted into the hearth, the problems of high-temperature scalding, high gas concentration, difficult thermocouple replacement, temperature measurement Kong Nan blocking and the like are faced during the production of rush repair. And because of the existence of vibration, the problem is only solved temporarily in each rush repair, and the problem is not solved fundamentally. In order to solve the problems, a hearth temperature detection device for a steel rolling heating furnace is firstly provided.

Disclosure of Invention

The utility model aims to solve the problems and provides a hearth temperature detection device for a steel rolling heating furnace.

The specific scheme of the utility model is as follows: the hearth temperature detection device for the steel rolling heating furnace comprises a hearth wall, wherein a wall hole is formed in the hearth wall, a base is arranged on the hearth wall, a middle hole corresponding to the wall hole is formed in the base, a heat preservation cylinder is arranged on the base, and the heat preservation cylinder is of a hollow structure and is used for isolating external temperature; the heat preservation section of thick bamboo is last to be equipped with the end cover, be equipped with the temperature measurement resistance bar with its sliding connection on the end cover, the temperature measurement resistance bar stretches into inside the furnace wall through the end cover for detect the temperature in the furnace wall, be equipped with locking mechanism on the end cover, locking mechanism is used for locking fixed temperature measurement resistance bar and the relative position of end cover.

Preferably, the locking mechanism comprises: two hold-down blocks which are symmetrically arranged relative to the temperature measuring resistance rod are in sliding connection with the end cover, the hold-down rods which correspond to the hold-down blocks are arranged on two sides of the end cover, the hold-down rods are in contact connection with the hold-down blocks, and the hold-down blocks are pushed to clamp and fix the temperature measuring resistance rod.

Preferably, the compression rod is a screw, and the screw is in threaded connection with the end cover.

Preferably, the compaction block is provided with a compaction surface, and the compaction surface is contacted with the temperature measuring resistor rod surface.

Preferably, the insulation cylinder comprises: the wall of the cylinder is internally provided with fire-resistant heat-insulating cotton, the inner side of the fire-resistant heat-insulating cotton is provided with heat-insulating holes, and the temperature measuring resistance rod penetrates through the heat-insulating holes.

Preferably, a fixing plate is arranged between the heat preservation cylinder and the base, a transition hole is arranged on the fixing plate, the bottom of the cylinder wall is welded and fixed with the fixing plate, and the fixing plate is adhered and fixed with the base.

Preferably, the base is a refractory brick.

Preferably, one end of the temperature measuring resistor rod extending out of the end cover is connected with a junction box.

Preferably, the end cover is detachably connected with the heat preservation cylinder.

Preferably, the end cover is in threaded connection with the heat preservation cylinder.

The utility model has the following beneficial effects: 1. the structure is simple, the installation is convenient, the temperature measuring resistance rod is fixed, displacement cannot be generated, and the temperature measuring point is fixed; 2. the positive pressure of the hearth can not blow fire-resistant cotton open, prevent flame from channeling outwards and isolate the flame from the outside, so that the ambient temperature is kept at room temperature, and the compensation lead works normally; 3. the maintenance and the replacement of the temperature measuring resistance rod are convenient and safe; 4. the temperature measurement is accurate, the furnace is not stopped, and the steel rolling quality is not affected; 5. the terminal in the junction box is not short-circuited, so that the display temperature is too low; 6. the holes are completely sealed, so that the gas leakage is less, and the safety is greatly improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic top view of a temperature sensing resistor bar being secured;

in the figure: 1. a furnace wall; 101. wall holes; 2. a base; 201. a middle hole; 3. a heat preservation cylinder; 301. a cylinder wall; 302. fireproof heat-insulating cotton; 303. a heat preservation hole; 4. an end cap; 5. junction box, 6, temperature measuring resistance bar; 7. a fixing plate; 701. a transition hole; 8. a locking mechanism; 801. a compaction block; 802. locking screws.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1-3, a hearth temperature detection device for a steel rolling heating furnace comprises a hearth wall 1, wherein a wall hole 101 is formed in the hearth wall 1, a base 2 is arranged on the hearth wall 1, a middle hole 201 corresponding to the wall hole 101 is formed in the base 2, a heat preservation cylinder 3 is arranged on the base 2, and the heat preservation cylinder 3 is of a hollow structure and is used for isolating external temperature; the heat preservation section of thick bamboo 3 is last to be equipped with end cover 4, be equipped with the temperature measurement resistance bar with its sliding connection on the end cover 4, the temperature measurement resistance bar stretches into inside the furnace wall 1 through end cover 4 for detect the temperature in the furnace wall 1, be equipped with locking mechanism 8 on the end cover 4, locking mechanism 8 is used for locking fixed temperature measurement resistance bar and the relative position of end cover 4.

Specifically, insert temperature measurement resistance bar in furnace through end cover 4, section of thick bamboo 3 etc. and utilize locking mechanism 8 to fix temperature measurement resistance bar, prevent that it from becoming flexible deformation because of the operational shock, guaranteed through section of thick bamboo 3 that furnace is isolated with outside temperature, prevent flame cluster department in the furnace, lead to ambient temperature to rise.

In this embodiment, the locking mechanism 8 includes: two hold-down blocks 801 that set up for temperature measurement resistance bar symmetry, two hold-down blocks 801 and end cover 4 sliding connection, end cover 4 both sides are equipped with the hold-down bar corresponding with the hold-down block 801, the hold-down bar is connected with the hold-down block 801 contact, promotes the hold-down block 801 through the hold-down bar and presss from both sides tight fixedly with temperature measurement resistance bar.

Specifically, the temperature measuring resistor rod is manually inserted to a proper depth, and the temperature measuring resistor rod is clamped and fixed by pushing the pressing block 801 by the pressing rod.

In this embodiment, the pressing rod is a screw, and the screw is in threaded connection with the end cover 4. Specifically, through screwing down the screw, realize that screw promotes compact heap 801 and press from both sides temperature measurement resistance bar tightly, convenient operation, when needing maintenance or with changing temperature measurement resistance bar, only need with the screw unscrew can.

In this embodiment, the pressing block 801 is provided with a pressing surface, and the pressing surface is in contact with the surface of the temperature measuring resistor. The compression surface is used for being in contact with the temperature measuring resistor rod surface, so that the contact area is increased, the friction coefficient is large, and the clamping effect is better.

In this embodiment, the thermal insulation cylinder 3 includes: the wall 301, be equipped with fire-resistant heat preservation cotton 302 in the wall 301, fire-resistant heat preservation cotton 302 inboard is equipped with thermal insulation hole 303, temperature measurement resistance bar passes thermal insulation hole 303.

In this embodiment, a fixing plate 7 is disposed between the thermal insulation cylinder 3 and the base 2, a transition hole 701 is disposed on the fixing plate 7, the bottom of the cylinder wall 301 is welded and fixed with the fixing plate 7, and the fixing plate 7 is fixed with the base 2 in an adhesive manner.

In this embodiment, the base 2 is a refractory brick.

In this embodiment, a junction box is connected to one end of the temperature measuring resistor rod extending out of the end cover 4.

In this embodiment, the end cover 4 is detachably connected to the thermal insulation cylinder 3.

In this embodiment, the end cover 4 is in threaded connection with the thermal insulation cylinder 3.

Claims

1. The utility model provides a be used for steel rolling heating furnace temperature detection device, includes furnace wall, open on the furnace wall has the wall hole, its characterized in that: the hearth wall is provided with a base, the base is provided with a middle hole corresponding to the wall hole, the base is provided with a heat preservation cylinder, and the heat preservation cylinder is of a hollow structure and is used for isolating external temperature; the heat preservation section of thick bamboo is last to be equipped with the end cover, be equipped with the temperature measurement resistance bar with its sliding connection on the end cover, the temperature measurement resistance bar stretches into inside the furnace wall through the end cover for detect the temperature in the furnace wall, be equipped with locking mechanism on the end cover, locking mechanism is used for locking fixed temperature measurement resistance bar and the relative position of end cover.

2. The hearth temperature detecting device for a steel rolling heating furnace according to claim 1, characterized in that: the locking mechanism includes: two hold-down blocks which are symmetrically arranged relative to the temperature measuring resistance rod are in sliding connection with the end cover, the hold-down rods which correspond to the hold-down blocks are arranged on two sides of the end cover, the hold-down rods are in contact connection with the hold-down blocks, and the hold-down blocks are pushed to clamp and fix the temperature measuring resistance rod.

3. The hearth temperature detecting device for a steel rolling heating furnace according to claim 2, characterized in that: the compressing rod is a screw which is in threaded connection with the end cover.

4. The hearth temperature detecting device for a steel rolling heating furnace according to claim 2, characterized in that: the compaction block is provided with a compaction surface, and the compaction surface is contacted with the temperature measuring resistor rod surface.

5. The hearth temperature detecting device for a steel rolling heating furnace according to claim 1, characterized in that: the heat preservation section of thick bamboo includes: the wall of the cylinder is internally provided with fire-resistant heat-insulating cotton, the inner side of the fire-resistant heat-insulating cotton is provided with heat-insulating holes, and the temperature measuring resistance rod penetrates through the heat-insulating holes.

6. The hearth temperature detecting device for a steel rolling heating furnace according to claim 5, wherein: the heat preservation section of thick bamboo is equipped with the fixed plate between and the base, be equipped with the transition hole on the fixed plate, section of thick bamboo wall bottom and fixed plate welded fastening, fixed plate and base bonding are fixed.

7. A furnace temperature detection device for a steel rolling heating furnace according to claim 3, characterized in that: the base is made of refractory bricks.

8. The hearth temperature detecting device for a steel rolling heating furnace according to claim 1, characterized in that: and one end of the temperature measuring resistor rod extending out of the end cover is connected with a junction box.

9. The hearth temperature detecting device for a steel rolling heating furnace according to claim 1, characterized in that: the end cover is detachably connected with the heat preservation cylinder.

10. The hearth temperature detecting device for a steel rolling heating furnace according to claim 9, characterized in that: the end cover is in threaded connection with the heat preservation cylinder.